Roller bearing for crank shafts, connecting rods, and the like



Jan. 19

' E. SCHNEIDER ROL BEARING FOR CRANK SHAFTS, CdNNECTING RQDS, AND THE LIKE Filed Sept. 19, 1923 2' Sheets-Sheet z E. $CHNElDER ROLLER BEARING FOR CRANK SHAFTS CONNECTINGRODS AND THE LIKE- 2 Sheets-Sheet 2 Filed Sept. 19, 1923 To all whom may concern:

stairs- SCHNEIDER, F yABIS, FRANCE,

EMNCE, A LIHIITELD JOINT ASSIG-NOR T0 SCHNEIDER &; CIR, OF PARIS,

STOCK COMPANY OF FRANCE.

EMJLLEZL EWING- FQE (FRANK SHAPES, CONNECTING RODS, AND THE LIKE.

Anpiioetion filed September 19, 1923. Serial No. 683,659.

Be it known that l, EUGiENE a citizen of the Republic of France, resident of Paris, France, have invented new and useful improvements in Roller Bearings for Crank Shafts, Connecting Rods,- and the like, which is fully set forth in the following specification.

Tl'ns invention has for obyect to provide an improved roller bearing forthe big ends of connecting rods on the cranlnpins ot' crankshatts in internal combustion engines. llith slight modifications this invention is equally applicable to the crank-shaft bearings in the crank case of such engines.

For mounting the roller bearings of J..crank-shaft crank-pins, one or other of the following expedients h ve been heretofore employs The crank-shaft has been made in several pieces which are fastened together, after erection, by means of keys, bolts, &c.; or the big end of the connecting rod comprises a cap which is fixed on the connecting rod proper after the latter has been placed in position on the crank-pin; or the big end of the connecting rod is made in one piece and can he slipped over the cranks of the crankshaftwhich is likewise made in one piece (in this case the roller races being split diametrelly), or it is necessary to provide in the crank-shaft notches designed to permit placing the rollers in position, these notches being subsequently closed by means offilling pieces designed to prevent the rollers from coming out.

The improved roller bearing of the present invention, does away with the disadvantages incident. to the use of the expedients hereinbefore mentioned. The improved roller bearing provides for the mounting of a'connecting rod made in one piece upon a crankshaft likewise. made in one piece and the use between the crank-pin and the big end of the. connecting rod, of roller bearings having continuous roller races, ithout the necessity of cutting-away or notching the crank-shaft for the purpose of inserting rollers. This improved arrangement ti, affords greater facility of machining erecting the parts, and greater strength of the assemblage.

constructional iforms of this improved bearin are illustrated by way of example in t e accompanying drawings:

.the connecting rod on the crank-pin of the crank-shaft of an internal combustion engine; and a roller bearing for carrying the crankshaft in the walls of the engine crank case.

- In these drawings Figure 1 is a section taken in a plane passing through the axis of the crank-pin and the axis of the connecting rod, illustrating the manner of mounting the connecting rod on the crank-shaft with the interposition of rollers; the roller cage not being shown.

Figure 2 is a section taken along the line 2 -2 of Figure 1.

Figures 3 and 4 show the two series of rollers mounted in their cages.

Figure 5 shows the two roller cagesas- .sembled in accordance with the present invention.

Figures 6. and 7 are respectively a side elevation and a section of the two part spacing ring (hereinafter referred to) for the two series of rollers; and

Figure 8 is a section taken in a plane passing through the axis of the crank-shaft bearing in the engine crank case.

In these figures 1 is a connecting rod and 2 is the crank-pin of the crankshaft of an internal combustion engine. Two series of rollers 3 run directly on two inner races 2 2' formed on the actual crank-pin, the outer races 4, 4 consisting of one-piece rings pressed into a cylindrical bore of the big endof the connecting rod, and having internal diameters of suilicient size to provide for slippng the same over the crank or cranks of the crank-shaft. Shoulders a The inner diameter of these shoulders a is such as to allow the connecting rod to fol:

low readily the cranks of the crank-shaft.

- 1 namely a roller bearing for the big end of Sonnnrnnn,

The big end of the connecting rod is notched atits lower part, and up to near a plane which, when the connecting rod is in position, passes through the axis of the crank-pin and" is at right angles to the .a-xis'of the connecting rod, it is milled-out i {for a width 0 to permit mounting'the rollers.

These rollers have a length that is slightly less than one-third. of thedistance between When the connectl ng rod 1, fitted with its means of stud bolts 7 (Fig. 7). The width of these half-rings is such that the rollers shall have just the amount of ay required to be able to turn without excessive friction, while preventing any longitudinal displacement of the connecting rod.

The distance between the rollers of each series is maintained by means of a cage of bronze or sheet steel.

In order to facilitate the assembling, each cage is composed'of two half-cages 8 and 9, and the two series of half-cages are con-' nected by means of long rivets 10 so-as. to form a complete cage (Fig. 5) for the two rows of rollers?" In theform shown (Fig. 5) each cage is provided. with a plurality of roller receiving pockets closed at the outer end and, open at the inner end.

The same principle is employed in Figure 8 for installing roller hearings in the mounting of the crank-shaft hearings in the corresponding lodgementsin the crank case.

In the same manner as the assembled connecting rod and crank, the rollers 14 roll directly on an inner race 15 formed on the crank 15, and the distance between the rollers of the single series of rollers is maintained by a cage (not shown) analogous to the cage 8910 shown in Figure 5. But

in this arrangement instead of shoulders as abutments for the rollers, the crank-shaft is formed with wide circular grooves 16 for the purpose of allowing the longitudinal displacements.- The outer roller race consists of two rings 11, 12 fastened together I bystud screws 13, said rings having internal diameters of sufficient size to provide for slipping the same over the crank or cranks of the crank-shaft and the rings being formed with checks 0 for guiding the rollers.

.The'improved roller bearing is assembled as follows :First the ring 11 is placed between the two webs of the crank-shaft, then the rollers are placed between their inner and outer aces. The ring 12 is then moved into its p sition shown in Figure 8, where upon the two rings are fitted one into the other, and the stub screws 13 are screwed in.

Then the crankshaft, with its bearing, is placed into the corresponding lodge ent in the crank case wall, and the cover of the crank case-is fastened on. As in the preceding arrangement, the internal' diameter of the cheeks cis such as to allow the rings '11 and 12 to be readily slipped over the crank'or cranks of the shaft.

Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed, I declare that what I' claim 1. In a roller bearing, the combination of a crank shaft having inner roller races ters of sufficient size to provide for slippi the same into position over a crank of sai shaft, and a plurality of rollers confined in rolling engagement with said inner races by said rings. l

2.. In a rollerbearing, the combination of a crank shaft having shoulders at the ends of its crank pin, a connectin rod on said pin and having a slot in its ig end, two outer races on the big end of the con necting rod and two inner races on said crank pin, two series of rollers confined in said races between said shoulders, said rollers being positioned by inserting the same through said slot, and a twopart spacing ring on said shaft between the two series of rollers. I r

' 3. In a roller bearing, the combination of a crank sh ft, a connecting rod on the in of said sha t and having a slot in its end, two outer races on the big end of the rod-and two inner races on said pin, two

series of rollers in said races and positioned v therein by inserting the same throu h the connecting rod slot, two cages in sai races each made in two parts and in which said rollers are pdsitioned, a two-part spacin ring between said series of rollers, an

means for securing the two cages together after the parts have been assembled.

4. In combination, a crank shaft, a 'o'ne-- piece race ring encircling "said shaft and .a'ving an internal diameter of suiiicient size to provide for slipping the same over a crank of said shaft, and alplurality of antifriction members confined in rolling engagement with said shaftby said race ring.

5. In combination, a crank shaft having a raceway integrally formed thereon, a onepiece race ring encircling said raceway and aving an internal diameter oi sufiicient size to provide for slipping the same over a crank of said shaft, and a plurality of antifriction members confined in rolling engagement with said raceway-by said race ring.

, 6. In combination, a crank shaft, a one piece race ring encircling said shaft and having an internal diameter of sufficient size to provide for slipping the same over a crank of said shaft, a check at one side of.

plurality of antifrid,

said race ring, and a tion members confined in rolling engagement with said shaft by said race ring.

7. In combination, a crank shaft, a pair of one-piece rings encircling said shaft and having internal diameters of sufiicient size to provide for slipping the same over a crank iao of said shaft, and a plurality of antifriction members confined in rolling engagement with said shaft by said rings.

8. In combination, a crank shaft, a one piece race ring encircling said shaft and having an internal diameter of snfiicient'size to provide for slipping the same over a crank of said shaft, a cage between said ring and shaft, and a plurality of antifriction members confined in. said cage by said ring.

9. In combination, a crank shaft, a onepiece race ring encircling said shaft, a cage between said ring and shaft, a second ring encircling said shaft, anda plurality of antifriction members in said cage and retained in rolling engagement with the shaft by said rings.

10. In combination, a crank shaft, :1 onepiece race ring encircling said shaft, a twopart cage between said ring and shaft, a second ring encircling the shaft and made in two parts, and a plurality of anti-friction members in said cage retained in rolling engagement with the shaft by said rings.

11. In combination, a crank shaft, a onepiece race ring encircling said shaft, a cage between said ring and shaft and having pockets closed at one end and open at the opposite end, a plurality of antifriction members in said cage and having rolling engagement with the shaft and ring, and a second ring encircling said shaft at the open ends of said pockets.

12. In combination, a crank shaft having an inner raceway formed on its pin, an outer raceway encircling said inner raceway and having an internal diameter of sufiicient size to provide for slipping the same over a crank of said shaft a cage between said raceways, and a plurality of antifriction members in said cage and having rolling engagement with said raceways.

13. In combination, a crank shaft, a connecting rod on the pin of said" shaft and having a slot in its big end, a race ring in said big end, a plurality of antifriction members confined in rolling engagement with said pin by said ring and positioned by inserting the same through said slot, and a twoart retaining ring on said pin.

14. n combination, a crank shaft, a connecting rod on the in of said shaft and having a slot in its big end,- a race ring encircling said pin, a cage between said rin and pin and having pockets closed at one en and open at the opposite end, and iii plurality of antifriction members insaid ca 'e and positioned by inserting the same tirough said slot.

15. In combination, a crank shaft, a race ring encircling said shaft and having an internal diameter of sufficient size to provide for slipping the same over the crank of said shaft, a cage between said ring and shaft engagement with the pin of said shaft, an

retaining means for said members comprising a shoulder at one end of the pin, a race ring encircling said members and havin a retaining cheek at one side thereof, an a retaining ring encircling said pin at the opposite side of said race ring.

17. In combination, a crank shaft, a'eonnectin rod on the pin of said shaft, a plurallty of antifriction members in 'rollir engagement with said pin, a cage in Whic said rollers are positioned, and retaining means for said members comprising a shoulder at one end of the crank pin, a race ring encircling said antifriction members and having a check at one side thereof, said race ring Lfi'lllg mounted on the big end of the conncctmg rod, and a retaining ring encircling said pin at theopposite side of said race ring.

18. In combination, a crank shaft, two outer race rings encircling said shaft and having internal diameters of suflicient size to provide for slipping the sameover a crank of said shaft, two series of rollers confined in rolling engagement with said shaft by said outer race rings, two cages for said rollers, and means connecting said cages together. I

19. In combination, a crank shaftya conneeting rod, on the pin of said shaft and having a slot in its big end, two spaced cages on said big end, one at each s de of said slot, and a plurality of antifriction members in' said cages and positioned therein from opposite directions by inserting the members through said slot.

In testimony whereof I have, signed this specification. EUGENE SCHNEIDER. 

